Mechanical loss in a glass-epoxy composite

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of Materials Research; (USA)

DOI:https://doi.org/10.1557/JMR.1990.0913· OSTI ID:6949637

Weller, M ^[1]; Ledbetter, H ^[2]

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1. Max-Planck-Institut fuer Metallforschung, Institut fuer Werkstoffwissenschaft, Stuttgart (Federal Republic of Germany)
2. Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80303 (USA)

Using a computer-controlled inverted torsion pendulum at frequencies near 1 Hz, we determined the mechanical losses in a uniaxially fiber-reinforced composite. The composite comprised glass fibers in an epoxy-resin matrix. We studied three fiber contents: 0, 41, and 49 vol. %. Three mechanical-loss peaks appeared: above 300 K, near 200 K, and near 130 K. They correspond closely to {alpha}, {beta}, and {gamma} peaks found previously in many polymers. We failed to see a mechanical-loss peak for either the glass or the glass-resin interface. Between 300 and 4 K, the torsion modulus increased in the resin by a factor of 3.30 and in the 0.49 glass-epoxy by a factor of 2.37.

• OSTI ID: 6949637
• Journal Information: Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 5:5; ISSN JMREE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COMPOSITE MATERIALS
ENERGY LOSSES
EPOXIDES
FIBERS
FREQUENCY RANGE
GLASS
HZ RANGE
LOSSES
LOW TEMPERATURE
MATERIALS
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PENDULUMS
TORSION
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE